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keys: Garbage collect keys for which the domain has been removed

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If a key operation domain (such as a network namespace) has been removed
then attempt to garbage collect all the keys that use it.

Signed-off-by: David Howells <dhowells@redhat.com>
This commit is contained in:
David Howells 2019-06-26 21:02:32 +01:00
parent 3b6e4de05e
commit 218e6424e7
3 changed files with 19 additions and 1 deletions
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2
include/linux/key.h
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@ -278,6 +278,7 @@ extern void key_revoke(struct key *key);
extern void key_invalidate(struct key *key);
extern void key_put(struct key *key);
extern bool key_put_tag(struct key_tag *tag);
extern void key_remove_domain(struct key_tag *domain_tag);
static inline struct key *__key_get(struct key *key)
{
@ -446,6 +447,7 @@ extern void key_init(void);
#define key_fsgid_changed(c) do { } while(0)
#define key_init() do { } while(0)
#define key_free_user_ns(ns) do { } while(0)
#define key_remove_domain(d) do { } while(0)
#endif /* CONFIG_KEYS */
#endif /* __KERNEL__ */